Automatic window-lock.



FREDERICK GRIMSHAW, 0F WANAQUE, NEW JERSEY.

AUTOMATIC WINDOW-LOCK.

Specification of Letters Patent.

Patented May 20, 1913.

Application filed May 7, 1912. Serial No. 695,731.

To all whom it may concern Be it known that I, FREDERICK GRiMsHAw, citizen of the United States, residing at lVanaque, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Automatic Window- Locks, of which the following is a specification.

My invention relates to new and useful improvements in window fasteners, and the object of my invention is to provide a fastener for windows having upper and lower sash members, said fastener being adapted to secure both members against movement when the window is closed.

A further object of my invention is to provide a fastener which will be automatic in its action, thus insuring the locking of the window when closed. And a further object of my invention is to provide a fastener in which the locking bolt may be made exceptionally long to insure its firm engagement in its keeper, this being permitted because of a catch positioned within the lock casing and adapted to normally hold the locking bolt in retracted position when the window is open and thereby prevent the end of the locking bolt from engaging against the transverse sash bars of the upper sash during'the movement of one sash past the other.

With these and other'objects in View, my invention will be more fully described, illustrated in the accompanying drawings and then specifically pointed out in the claim which is attached to and forms a part of this application.

In the drawings: Figure 1 is a perspective of my fastener in operation. Fig. 2 is a top plan view of the fastener, the casing being shown in section, the locking bolt being shown in extended position. Fig. 3 is a front elevation of the fastener, the face plate of the casing being removed, the trigger being shown ininoperative position. Fig. 1 is a view similar to Fig.2 but with the locking bolt shown in retracted position. Fig. 5 is a view similar to Fig. 3 but with the trigger in operativeposition. Fig. 6 is a section on the line 66 of Fig. 3. Fig. 7 is a perspective of the locking bolt. Fig. 8 is a perspec tive of the trigger. Fig. 9 is a perspective of the idler bolt. Fig. 10 is an elevation of a window with my fastener applied.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters.

For the sake of clearness, I have illustrated my improved fastener in application upon a window of conventional type, including a window frameor casing 10 having the usual partition strip 11 forming guides for an upper sash member 12 and a lower sash member 13 having vertically extending sash bars 1-1 and horizontally extending sash bars 15.

My improved fastener includes a keeper 16 adapted for attachment to the lower sash rail of the upper sash member and comprising a body member provided with an upwardly directed extension 17 having its in ner upper portion beveled as at 18, the body member being recessed immediately below this extension to form a socket 19 for the reception of the lockingbolt of the lock. The upper portion of the inner face of the body member is also beveled as shown at 20 for a purpose which will be hereinafter explained.

The fastener proper includes a casing 21 adapted for attachment by ears 22 to the upper sash rail of the lower sash member. This casing includes end walls 23, a back wall 2 },v

top and bottom walls 25 and a removable face plate 26. The upper corner portions of the backwall and face plate are apertured as shown at 27 for-the passage of a locking bolt 28 which, in the closed position of the sashes, extends through the rear wall of the casing to seat inthe socket 19, this extension being limited by a stop pin 29 extending downwardly from its lower face and engaging against the rear wall of the casing. The extended end of this locking bolt is beveled as shown at 30 to engage with the beveled face of the extension 17 when the window Y is being closed to cause the bolt to be moved to retracted position. The other end of the boltextends through the face plate of the casing and is provided with a ring or other suitable device 31 for manipulating the bolt.

As a means for normally holding the bolt in extended position, I have provided a pin 32 which extends vertically of the casing, one end being mounted in the top and the other in the bottom wall thereof and a coiled spring 33 surrounds this pin and bears by an extended arm 34 against a pin 35 depending from the lower face of the bolt.

Asa means for holding the locking bolt in retracted position when the window is open, I have provided the same with a vertically e xtending groove 36, so formed as to lie just within the casing when the bolt is retracted in position to seat the free end of a pivoted trigger 37 which is normally held in engagement with the grooved face of the bolt by a coiled spring 38, one end of which is seated about a pin 39 extending inwardly from one of the end walls of the casing and the other end of which is seated about a cylindrical extension 40 formed upon the' free end of the trigger.

As will be readily seen, upon manually retracting the locking bolt to open the window, the trigger will engage in the groove 36 back wall and face plate, and that end of the bolt extending through the back wall of the casing is beveled as shown at 43 to engage with the beveled face 20 of the keeper. It

. will therefore be seen that upon the closing of the window, this idler bolt will be moved toward the front of the casing against the action of the extended arm 44 of the spring 33,'which arm bears against a depending pin 45 carried by the idler bolt, the spring tending to normally maintain the idler bolt in extended position. The idler bolt is provided intermediate its length with a laterally directed arm 46 having a beveled ter minal 47 bearing against the beveled rear face 48 of the free end of the trigger 37 these beveled faces being so formed that the retraction of the idler bolt will act through its arm to swing the trigger out of engagement with the locking bolt to release the latter.

I11 operation, assuming the window to be closed and locked, the locking bolt is re tracted by means of the ring 31 to disengage it from the keeper, and the window is raised while the bolt is still held manually against the action of its spring. As soon as the end of the idler bolt has passed above the body of the keeper, the spring 33 will move the idler bolt to extended position, thereby re leasing the trigger and permitting the same to engage or seat in the groove of the locking bolt to hold the same in retracted position. When the window is closed, the exvidler bolt and trigger, the locking bolt may be formed to extend a considerable distance beyond the rear wall of the lock casing with out in any way interfering with the relative movement of the window members, as the trigger will hold the locking bolt in retracted position and prevent it from engaging with the transverse sash bars of the upper sash.

If desired, the trigger may be thrown out of engagement with the locking bolt at any time, by manually retracting the idler bolt. For example, this may be done when the upper sash rail of the lower sash is between the lower sash rail of the upper sash and the next adjacent sash bar 15, and the conse v quent extension of the locking bolt will act to prevent the raising of the windowxto bring its upper sash bar above the sash rail 15, due to its engagement with the trans verse sash bar of the upper sash.

To prevent any possibility of unlocking if the window from the outside as by theinsertion of a knife blade between theTsashes to force back the locking bolt, I have provided the locking bolt with a channel 49 so positioned that in the active position of the locking bolt a dog 50, which is pivoted to the face plate 21, will fall by gravity to seat in the groove. This dog, as shown, is provided with a thumb piece which limits its movement and assists in its disengagement when the bolt is to be disengaged.

What I claim is In a lock, the combination with a keeper having a bolt receiving socket, of a lock casi ing, spring pressed bolts mounted in said casing, means for manually retracting both of said bolts, means for locking one of said bolts in retracted posit-ion, and means operable by the retracting of the other bolt for releasing thefirst bolt.

In testimony whereof I affix my signature in presence of two wltnesses.

FREDERICK GRIMSHAW. [1,. 8-]

Witnesses: I

J. G. LANGE, Jr., G. E. PAULISON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, i

- Washington, D. G. 

